Chlorofluoromethane or Freon 31 is the

hydrochlorofluorocarbon Chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are fully or partly halogenated hydrocarbons that contain carbon (C), hydrogen (H), chlorine (Cl), and fluorine (F). They are produced as volatile derivatives of methane, ethane, ...

(HCFC) with the formula CH₂ClF. It is a colorless, odorless, flammable gas. It is a class II ozone depleting substance and in accordance with the montreal protocol, its production and import were banned on 1 January 2015.

Uses

Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives

hexafluorobenzene Hexafluorobenzene, HFB or perfluorobenzene is an organofluorine compound with the chemical formula . In this derivative of benzene, all hydrogen atoms have been replaced by fluorine atoms. The technical uses of the compound are limited, although i ...

: :3 CHCl₂F + 3 CH₂ClF → C₆F₆ + 9 HCl It was used as a

refrigerant A refrigerant is a working fluid used in the cooling, heating, or reverse cooling/heating cycles of air conditioning systems and heat pumps, where they undergo a repeated phase transition from a liquid to a gas and back again. Refrigerants are ...

and has an

ozone depletion potential The ozone depletion potential (ODP) of a chemical compound is the relative amount of degradation to the ozone layer it can cause, with trichlorofluoromethane (R-11 or CFC-11) being fixed at an ODP of 1.0. Chlorodifluoromethane (R-22), for examp ...

of 0.02.

Additional data

Its crystal structure is

monoclinic In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three Vector (geometric), vectors. In the monoclinic system, the crystal is described by vectors of unequal lengths, as in t ...

with

space group In mathematics, physics and chemistry, a space group is the symmetry group of a repeating pattern in space, usually in three dimensions. The elements of a space group (its symmetry operations) are the rigid transformations of the pattern that ...

P2₁ and

lattice constant A lattice constant or lattice parameter is one of the physical dimensions and angles that determine the geometry of the unit cells in a crystal lattice, and is proportional to the distance between atoms in the crystal. A simple cubic crystal has ...

s ''a'' = 6.7676, ''b'' = 4.1477, ''c'' = 5.0206 (0.10⁻¹ nm), β = 108.205°. At an altitude of 22 km, traces of chlorofluoromethane occur (148 ppt).

References

External links

Thermochemical table at chemnet.ru

Infrared Spectrum of Chlorofluoromethane
* IARC Summaries & Evaluations

{{Halomethanes Hydrochlorofluorocarbons Halomethanes Refrigerants IARC Group 3 carcinogens Ozone-depleting chemical substances Chlorofluoroalkanes